本地运行一会就报错，删除runtime就好了，请问下是什么原因导致的
version 6.0.0RC3
服务器：window10 mysql8.0.12 php PHP 7.3.4
file:vendor\topthink\think-cache\src\cache\Driver.php
line:242
错误原因：Argument 1 passed to think\cache\Driver::unserialize() must be of the type string, bool given, called in vendor\topthink\think-cache\src\cache\driver\File.php on line 126